1. Review of action items

- None Open

2. Boundary conditions

- Upcoming Maneuvers
o May, during week 20. Momentum Management needed.
To satisfy a spacecraft constraint that the net momentum on
the reaction wheels should be positive rather than negative.
Possibility exists that the constraint could be waived.
Most likely date for the manuever is May 18th, but this
has not yet been confirmed.
o June
Momentum Management / Station Keeping / Momentum Mangeament
and then gyroless spacecraft software patches.
Station Keeping should be ~ 500 grams of fuel.
No dates determined yet for these activities, but will not be
before the end of MDI continuous contact.
- MDI Continuous, ends June 13th.
- Whole Sun Month #3, August 18 - September 14
Doug Biesecker is working with Karin Muglach such that JOP097
will be incorporated into whole Sun Month. So there will be
no conflict with JOP097 scheduled for 10-20 September.
- Other Operations Items:
* Additional DSN time has been requested to support:
- JOP097 (September 10-20), so MDI high rate is available
between 7-17 UT.
- MEDOC campaign (September 27-October 17), so MDI high
rate is available between 8-12 UT.
In addition, a backup antenna has been requested for supporting
eclipse observations.
* The additional submode patches (other than 5 and 6) were not
re-loaded on-board the S/C. This will be scheduled shortly,
such that they will be available if needed.

3. Priorities for the coming month

a) Joint observing plans
See monthly calendar.
b) Individual instrument plans
CDS -- Other than activities already listed on the calendar:
TITLE: FLARE STUDY, DATES: March 30 to April 2 inclusive
CONTACT: Anja Czaykowska - acz@sag.lmsal.com
Anticipate many hours of sit and stare in 'wait' mode or
just an hour or two in the interrupt mode. Perhaps anticipate 2-3
runs of 6-8 hours on a suitable active region.
TITLE: WAVE STUDY, DATES: March/April
Raster to be run at quiet Sun centre run for periods of 8 hours at a
time. CONTACT: Andrzej Fludra
TITLE: TRAPPED WAVES
ACTIVITY: Run GMODE raster. Point to the limb in a polar coronal hole
Duration - 24-36 hrs. Option (lower priority): point to an equatorial
coronal hole and follow with solar rotation for 24 hrs.
CONTACT: Yu-Qing Lou (Chicago), A. Poland and A. Fludra
TITLE: LOOP STUDIES, DATES: Week of 5-11 April
ACTIVITY: Run LOOPS_3 on quiet Sun targets and PROFILE on active
region targets. CONTACT: Jack Ireland
SUMER -- (extracted from e-mail from Werner Curdt)
plan to come to the EOF in the evening of Thursday, 29-Apr-99.
The idea is to attend the weekly planning on Friday, and
to resume SUMER operations in the second half of Friday.
For this exercise, we need submode 5. During the weekend we want
to setup the instrument for JOPs 95 and 78 and to perform
non-campaign type operations. We will try to run the instrument in an
ultra-stable mode for these oscillation programmes.....
The Tenerife observatories will be operational from Tuesday,
4-May-99 onwards. Davina will also be at the EOF.
She will co-ordinate her x-ray jets campaign with Yohkoh and Trace.
This activity extends into the next week, which almost
guarantees a smooth transition into the MEDOC#3 campaign.
For our activities, it does not really matter, when the handover
will take place. We will leave GSFC on Thursday, assuming that
any remainders in the timeline can be handled from MEDOC and
don't need additional support from us.
UVCS -- During week 15, OVI detector work, CME watch main priority.
EIT -- synoptic and full field, full resolution images in Submode 6.
LASCO -- Usual synoptic. Commented on objectives of the VAULT rocket
flight scheduled for April 21.
VAULT = Very high resolution Advanced Ultraviolet Telescope
It's the succesor of the HRTS series using CCD instead of film.
It's a zero dispersion spetroheliograph. Resolution is
about 0.25 arcsec. In this flight we will observe Lya (1216A).
FOV = 4.3'x 6.4'. Target will be a suitable active region
close to central meridian. The coordinators have not
made specific requests yet as to what LASCO and EIT support is
desired.
MDI -- So far during the 1999 Continuous Dynamics run,
MDI has been taking one-minute cadence, full-disk magnetograms
and Dopplergrams cropped at 480 pixels (compared to a solar limb
radius of about 490 pixels, so that the outer 10 pixels near the
limb are lost). For the next two weeks, the high-rate magnetogram
radius will cover 492 pixels (i.e., the whole disk)
while the Dopplergrams remain cropped to a 480-pixel radius.
Then for the next month, the high-rate magnetograms will be
cropped to a 480-pixel radius while the Dopplergrams will cover
the whole disk. The synoptic (96-minute cadence) full-disk
magnetograms cover the whole disk throughout. In the last 30 days
of the continuous contact, a high-resolution magnetogram
may be brought down instead of the cropped full-disk magnetogram.
The decision on whether this change will be made depends on
analysis of data from the first half of the period.
c) Intercalibration activities
Intercalibration 001 will be in Week 15.
CDS, EIT and possibly TRACE will participate.

4. Preview of future months

- April 30, SUMER resumes operations.
- May
- May 15 - June 7: TRACE & SVST coordination. Contact: Tom Berger.
TRACE representative did not have information concerning
what ground based observations and science priorities would
be the goals during this collaboration.
- IPS measurements (see calendar)
- MEDOC campaign
Jean-Claude Vial sent Laura Roberts a list of activities
that has been placed in the calendar. Basically, the SPWG
would like to see joint observations written up as JOPs
and have them in place for the next April SPWG.
Laura will send Jean-Claude an e-mail message with details
of the discussion.
- August Eclipse
A SOHO WWW eclipse site has been developed and will be linked
to the SOHO Operations page in another week or so.
No requests have been received yet for SOHO to support any
expeditions. An announcement will be made to Solar News
in the near future regarding this.
- See Monthly Calendar at
http://sohowww.nascom.nasa.gov/soc/head_calendar.html

5. JOPs status

- NEW version of:
JOP097 -- Karin Muglach
OSCILLATIONS IN SUNSPOTS AND ACTIVE REGIONS
TRACE, MDI, EIT, Tenerife VTT and GCT, LaPalma DOT and SVST
MDI will support this. TRACE has replied to Karin that it was
too early to commit yet. JOP accepted.
- Review of JOPs as number approaches/reaches 100.
Still to be performed.